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2017 Ram 1500 Rebel Air Suspension Sagging & Compressor Running Constantly

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Chris P. · rep 0 · May 22, 3:37 AM · 1 replies · solved · Question

Vehicle: 2017 Ram 1500 Rebel

My 2017 Ram 1500 Rebel, which has the factory air suspension, has been acting up lately. I've noticed that the rear end, and sometimes even the front, sags significantly overnight or after sitting for a few hours. When I start it up, the compressor runs for a really long time, trying to level the truck, and I'm getting a 'Service Air Suspension' message on the dash.

It feels like it's struggling to maintain ride height, and I'm worried about the compressor burning out. Has anyone else with a 2016-2018 Ram 1500 experienced this? What was the cause, and what kind of repair costs am I looking at? Is this a common reliability issue with the air suspension?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:37 AM

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ClearTheCode admin answer:

Your description of the sagging suspension and constantly running compressor is a classic symptom of a leak in the factory air suspension system, a known reliability concern for Ram 1500 trucks equipped with this option. The 'Service Air Suspension' message confirms a fault has been detected.

Here's a breakdown of the common issues and what to do:

  1. Common Causes of Leaks:
    • Air Springs (Bags): These are the most common culprits. Over time, the rubber can crack, chafe, or develop pinhole leaks, especially where they fold or rub against other components. The rear air springs are particularly prone to this.
    • Air Lines/Fittings: The plastic air lines or their connections to the air springs, valve block, or compressor can develop leaks.
    • Valve Block: This component directs air to different air springs. Internal seals can fail, leading to leaks.
  2. Compressor Overwork: When there's a leak, the air suspension compressor has to work harder and longer to maintain ride height. This excessive operation can lead to premature failure of the compressor itself, which is an expensive component.
  3. Diagnosis: A qualified technician will typically use a soapy water solution to spray suspected leak points (air springs, lines, fittings) to visually identify bubbles indicating a leak. They will also check for fault codes stored in the air suspension control module.
  4. Repair Options:
    • Air Spring Replacement: If an air spring is leaking, it will need to be replaced. It's often recommended to replace them in pairs (e.g., both rears) to ensure even ride height and wear.
    • Line/Fitting Repair: Leaking lines or fittings are usually simpler and less costly to repair.
    • Compressor Replacement: If the compressor has been overworked and failed, it will also need replacement, adding significantly to the repair cost.
  5. When to See a Shop: You should get this inspected as soon as possible. Continuing to drive with a leaking system and an overworked compressor will almost certainly lead to compressor failure, turning a potentially moderate repair into a much more expensive one. Ignoring it can also compromise handling and tire wear.
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